Nut-lock



L. 0. SMITH, NUT LOOK.

No. 551,737. l Patented Dec. 1'7, 1-895.

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MIMI! @wwf W l "u" I llfmmlml" l I l NIH UNITED STATES ATENT OFFICE.

LEE OGDEN SMITH, OF OLIVE, TEST VIRGINIA.

.N UT-LOCK.

SPECIFICATION forming part of Letters Patent N0. 551,737, dated December 17, 1895.

Application filed September 26, 1895. Serial No. 563,754. (No model.)

To a/ZZ whom it may concern:

Be it known that I, LEE OGDEN SMITH, residing at Olive, in the county of Harrison and State of West Virginia, have invented a new and Improved Nut-Lock, of which the following is a specification.

This invention relates generally to nutlocks and particularly to a combination-lock which operates upon both the thread and top of the nut.

The object of the invention is to provide an exceedingly simple contrivance which can be quickly and easily applied to the bolt and nut to securely lock them, and a lock which can be removed without damaging nut or bolt.

Another object is to provide a locking device which can be applied to lockthe nut in any desired position.

With these andV such other objects as will appear hereinafter my invention consists in the peculiar construction of the several parts and the novel manner of combining and arranging them, as will be fully described in detail, and then pointed out in the claims.

In the drawings hereto annexed and forming a part of this specification, Figure l is a perspective view showing` the ends of two rails and wherein my improved nut-locks are shown applied to the nuts. Fig. 2 is a transverse sectional view on the line 2 2 of Fig. l. Fig. 3 is a detail side elevation. Fig. 4 is a sectional view of the nut-bolt and key, showing the key in locked position. Fig. 5 is a similar view showin g the key in unlocked position, and Fig. 6 is aviewillustrating the bolt nut and key in detail.

In Fig.l l I have shown my nut-lock applied to the meeting end of the rails A and the fish-plate B, but it will of course be understood that it can be used in other situations, such as bridges, scaffolds, engine parts and the like. The nut C is of the usual or ordinary construction. The bolt D however has a longitudinal groove d produced in the threaded end, and near the end said bolt is cut away or flattened at d d, as most clearly shown in Fig. 6, for the purpose of providing a seat for the locking-key to rest against.

The lock device Econsists of a key portion e and a head portion e', the purpose of which is to throw the key into a locked position, as presently explained.

The groove d is a little less than a perfect circle and the key e is essentially of the same shape in crosssection and -of such size that said key can be easily inserted in the said groove. The keyphas one of its sides threaded or serrated, as shown at e3, Fig. 6, while the other faces are smooth. The head is prefen ably angular in shape, and upon the side remote from the threaded or serrated portion c3 said head is formed with a notch or recess e2, which engages the seat CZ when the key is locked, and when said head is so seated the teeth e3 are held locked in engagement with the threads of the nut, as now explained.

In operation the nut is screwed down until the desired point is reached. The key is then inserted in the groove in the bolt, the teeth or serrations ebeing turned inward, as shown in Fig. 5. This key is inserted as far as possible and then by turning the head so as to bring the notch e2 against the seat d the threads or teeth e3 will be thrown into engagement with the thread of the nut, as most clearly shown in Fig. 4. The nut is now held locked against movement and in practice I prefer to have the headerest upon the top of nut, so that an additional safeguard is provided, because if the nut should have atendency to work upward the pressure on the head would cause an additional binding action between the threads of the key and nut. To remove the lock it is onlynecessary to reverse the head and then withdraw the key.

From the foregoing description, taken in connection with the accompanying drawings, the operation and advantages of my improved lock will be readily perceived, and it will also be noticed that the device can be very cheaply made and easily applied and removed.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-

I. In anut lock the combination with a bolt having a longitudinal groove, of an ordinary nut adapted to be screwed upon said bolt and a key having a iiat side and teeth or serrations upon its Acurved side, said key being adapted to be inserted in the groove and turned to engage the threads in the nut substantially as shown and described.

2. In anut lock the combination with a bolt grooved longitudinally, of an ordinary nut,

IOO

and t keyhavng teeth orserrations upon one side, and zt head upon said key, said head beng notched so that the head can be tui-ned back upon the boltI substantially as shown and described.

Inanut lock the combination with :t bolt longitudinally grooved and flattened at the end, of an ordinary nut, and :t key having teeth o11 sermtions upon one side and :L head notched on one side to receive the htttened 1o portion of the bolt on one side of the gromf'e substantially as shown and described.

LEE OGDEN SMITH. lVtneSses:

J'. D. IIARDMAN, C. F. BAILEY. 

